forked from DecentralizedClimateFoundation/DCIPs
63 lines
2.2 KiB
Markdown
63 lines
2.2 KiB
Markdown
---
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eip: 2474
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title: Coinbase calls
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author: Ricardo Guilherme Schmidt (@3esmit)
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discussions-to: https://ethresear.ch/t/gas-abstraction-non-signed-block-validator-only-procedures/4388/2
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status: Stagnant
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type: Standards Track
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category: Core
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created: 2020-01-19
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---
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## Simple Summary
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Allow contracts to be called directly by `block.coinbase` (block validator), without a transaction.
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## Abstract
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_In proof-of-work blockchains, validators are known as miners._
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The validator might want to execute functions directly, without having to sign a transaction. Some examples might be presenting a proof in a contract for an change which also benefits the validator.
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A notable example would be when a validator want to act as an [EIP-1077](./eip-1077.md) Gas Relayer, incentivized to pick up fees from meta transactions.
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Without this change, they can do so by signing from any address a `gasPrice = 0` transaction with the gas relayed call.
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However this brings an overhead of a signed transaction by validator that does nothing, as `msg.sender` is never used, and there is no gas cost to EVM charge.
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This proposal makes possible to remove this unused ecrecover.
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## Motivation
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In order to reduce the overhead of calls that don't use `msg.sender` and are being called by validator with `tx.gasPrice = 0`.
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## Specification
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The calls to be executed by `block.coinbase` would be included first at block, and would consume normally the gas of block, however they won't pay/cost gas, instead the call logic would pay the validator in other form.
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Would be valid to execute any calls without a transaction by the block coinbase, except when the validator call tries to read `msg.sender`, which would throw an invalid jump.
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Calls included by the validator would have `tx.origin = block.coinbase` and `gas.price = 0` for the rest of call stack, the rest follows as normal calls.
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## Rationale
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TBD
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## Backwards Compatibility
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`tx.origin = block.coinbase` could cause some issues on bad designed contracts, such as using `tx.origin` to validate a signature, an analysis on how contracts use tx.origin might be useful to decide if this is a good choice.
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## Test Cases
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TBD
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## Implementation
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TBD
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## Security Considerations
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TBD
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## Copyright
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Copyright and related rights waived via [CC0](../LICENSE.md).
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